WO2020200430A1 - Procédé de fabrication d'une courroie élévatrice composite comprenant une ou plusieurs couches de fibres - Google Patents

Procédé de fabrication d'une courroie élévatrice composite comprenant une ou plusieurs couches de fibres Download PDF

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Publication number
WO2020200430A1
WO2020200430A1 PCT/EP2019/058302 EP2019058302W WO2020200430A1 WO 2020200430 A1 WO2020200430 A1 WO 2020200430A1 EP 2019058302 W EP2019058302 W EP 2019058302W WO 2020200430 A1 WO2020200430 A1 WO 2020200430A1
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WIPO (PCT)
Prior art keywords
fibers
fiber
fiber layer
roving
process according
Prior art date
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Ceased
Application number
PCT/EP2019/058302
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English (en)
Inventor
Frank Dudde
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TK Elevator Innovation and Operations GmbH
Original Assignee
ThyssenKrupp Elevator Innovation and Operations GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ThyssenKrupp Elevator Innovation and Operations GmbH filed Critical ThyssenKrupp Elevator Innovation and Operations GmbH
Priority to PCT/EP2019/058302 priority Critical patent/WO2020200430A1/fr
Publication of WO2020200430A1 publication Critical patent/WO2020200430A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/06—Arrangements of ropes or cables
    • B66B7/062—Belts
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D07B1/145—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising elements for indicating or detecting the rope or cable status
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10—Coating or impregnating independently of the moulding or shaping step
    • B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length

Definitions

  • the present invention is generally directed to composite elevator belts for use in lifting and lowering an elevator car. More particularly, the present invention relates to a process for producing a composite elevator belt having one or more fiber layer and a composite elevator belt obtained therefrom.
  • Elevators for vertically transporting people and goods are an integral part of modern residential and commercial buildings.
  • a typical elevator system includes one or more elevator cars raised and lowered by a hoist system.
  • the hoist system typically includes both driven and idler sheave assemblies over which one or more tension members attached to the elevator car are driven.
  • Tension members can also be attached to the counterweight or building structure itself.
  • the elevator car is raised or lowered due to traction between the tension members and drive sheaves.
  • tension member types including wire rope, V-belts, flat belts, and chains, may be used, with the sheave assemblies having corresponding running surfaces to transmit tractive force between the tension members and the sheave assemblies.
  • a limiting factor in the design of current elevator systems is the minimum bend radius of the tension members. If a tension member is flexed beyond its minimum bend radius, the compressive forces within the tension member may exceed the breaking strength of the tension member material. Continuous operation of the tension members below their minimum bend radii can cause fatigue at an increased and unpredictable rate and, under extreme circumstances, may result in elastic deformation and failure. Thus, minimum size of the sheaves useable in an elevator system is governed by the minimum bend radius of the tension members.
  • sheaves having a smaller diameter allow for more economical elevator system designs.
  • the overall component cost of an elevator system can be significantly reduced by using smaller diameter sheaves and sheave assemblies.
  • smaller diameter sheaves reduce the motor torque necessary to drive the elevator system, thereby permitting use of smaller drive motors and allowing for smaller hoistway dimensions.
  • decreasing the bend radius of the tension members generally permits easier installation and decreases the spool size of the tension members. Accordingly, minimizing the bend radius of elevator tension members, and conversely increasing tension member flexibility, is desirable.
  • composite belts having fiber or fiber strands encased in a resin or polymer generally offer the greatest flexibility.
  • such belts must typically have a ratio of the bending diameter to the thickness of the load carrier of greater than 200 (that is, D/t > 200, where“D” is bending diameter and“t” is load carrier thickness) to attain a sufficient fatigue life of the belt.
  • the minimum sheave diameter in a high rise elevator using known composite belts ranges from approximately 600 millimeters to approximately 1000 millimeters due to the stiffness of suitable resin casings.
  • the resin must have a Young’s modulus of approximately 2 gigapascals (GPa) or greater to adequately support the fibers or strands.
  • the fiber arrangement in a composite belt is a determining factor in the resulting physical properties of the belt, such as bending flexibility, fatigue, stiffness and breaking strength.
  • load carriers comprise unidirectional orientated fibers embedded in a matrix system.
  • a cross-sectional view in the width-thickness direction of a typical composite belt shows an unequal distance pattern between adjacent fibers over the whole cross-sectional area.
  • the problem of uneven fiber distribution is further compounded by different fiber diameters due to the use of fibers having non-identical diameter sizes, fibers comprising bonding agents and fibers comprising primers.
  • the invention provides a solution to the above problem and is described in the following embodiments.
  • the invention relates to:
  • each roving comprises a plurality of fibers.
  • the rovings are preferably comprised on a spool rack wherein said rack comprises a plurality of spools.
  • Each spool within the plurality of spools has a breaking mechanism, this preferably helps to control the pre-tensioning of the roving before fiber spreading.
  • the spools are preferably positioned one above the other so that the fibers of the rovings form vertical layers when being pulled in a pulling direction D P .
  • Width W R is preferably in the range of from 1 mm to 10 mm, more preferably in the range of from 2 mm to 8 mm, most preferably in the range of from 4 mm to 6 mm.
  • width W R is increased to a width W c .
  • width W c is in the range of from 35 mm to 75 mm, more preferably in the range of from 40 mm to 60 mm, most preferably in the range of from 41 mm to 43 mm;
  • Futher treatment preferably comprises at least curing the load carrier
  • width Wc increases to W B .
  • width W B is in the range of from 35 mm to 85 mm, more preferably, in the range from 42 mm to 70 mm, most preferably in the range of from 43 mm to 50 mm.
  • the process according to the invention is characterized in that the plurality of fibers of a first roving undergo process steps (b) and (c) separately from the plurality of fibers of at least one further roving, wherein the plurality fibers of the first roving and the plurality fibers of the further roving undergo process steps (b) to (c) simultaneously, preferably process steps (b) to (e) simultaneously.
  • This advantageously provides that each roving is individually treated before being contacted with at least one further roving. Additionally it provides for a controlled spreading of the fibers and thereby a control over the fiber distribution within the cross-section of the resulting composite elevator belt.
  • the composite elevator belt preferably comprises carbon fibers.
  • the plurality of fibers of a first roving are combined with a plurality of fibers of at least a second roving, wherein the combined fibers undergo process steps (b) and (c) separately from the plurality of fibers of at least one further roving, wherein the plurality fibers of the combined first and second roving and the plurality fibers of the at least one further roving undergo process steps (b) to (e) simultaneously.
  • the at least one further roving can also be combined with a plurality of fibers from at least one additional roving. This advantageously provides that each roving, including the combined roving, is individually treated before being contacted with at least one further roving. Additionally it provides for a controlled spreading of the fibers and thereby a control over the fiber distribution within the cross-section of the resulting composite elevator belt.
  • the composite elevator belt preferably comprises carbon fibers.
  • the spreading apparatus comprises more than one spreading means.
  • the spreading apparatus comprises more than 2 spreading means, more preferably, the spreading apparatus comprises 3 spreading means.
  • the number of spreading means used will ultimately be determined by the physical traits of the roving itself, e.g., thickness, width.
  • the spreading means advantageously increases the width of the roving from width W R to width Wc- It is preferred that at least one spreading means is powered. This advantageously creates a defined relative movement between the moving fibers and the spreading bar surface allowing maintenance of an equal fiber distribution over the width of the load carrier and thereby the belt.
  • At least one spreading means is movable. It is preferably powered and can be optionally rotatable.
  • Preferably at least one spreading means has an uneven outer circumference to facilitate equal spreading of fibers in the width direction. This advantageously improves the spreading process.
  • a preferred circumference geometry comprises peaks and troughs since this geometry can separate fibers easier than a smooth circumference.
  • An example of such a geometry includes a crown shape.
  • more than one spreading means has an uneven circumference.
  • all spreading means have an uneven circumference, wherein the uneven circumference has a crown shape.
  • the resin bath comprises a resin material and at least one impregnation means for impregnating the spread rovings.
  • the resin material is preferably a matrix material, more preferably a polymer matrix material. Suitable resin materials for elevator belts are well known in the art and thus will not be described in further detail.
  • the impregnation means is preferably adapted to rotate and is preferably of a wheel shape.
  • the resin bath comprises at least a first impregnation means which moves at a first speed, preferably, the speed of tractor, and a second impregnation means which moves at a second speed.
  • the second impregnation means can move in the same direction as the first impregnation means or a different one.
  • the second speed can be the same as the first speed or different.
  • the second impregnation means moves in a direction that is opposite to the pulling direction of the tractor.
  • the second impregnation means moves in a direction that is opposite to the pulling direction of the tractor and opposite to the direction of the first impregnation means. This advantageously improves resin coverage.
  • the impregnation means are in the form of wheels. Said wheels advantageously facilitate the distribution of resin throughout the fibers.
  • the impregnation means are preferably controllable by varying the speed/direction of movement of the wheels.
  • the resin bath further comprises at least one further impregnation means.
  • the at least one further impregnation means can move in the same direction as the pulling direction as the tractor or different. It can also move at the same speed as the first and/or second impregnation means or different.
  • the further impregnation means moves in the same direction as the pulling direction of the tractor, it is also preferred that it travels at a similar speed to the pulling speed, this avoids any slackening of fibers as well as any unnecessary strain from over-stretching.
  • the further impregnation means advantageously facilitates the removal of the impregnated roving from the resin bath and also gives the fiber bundle more shape before pultrusion.
  • the fibers of the rovings are pre-treated before process step (b). This advantageously improves fiber quality before treatment takes place and thus ultimately provides a higher quality composite belt.
  • the pre treatment step is one selected from pre-tensioning, or heating, or a combination of both. Most preferably, it is a combination of both.
  • Tensioning removes any slack within the fiber so that all fibers have the same pre-tension before any further process step is taken. Fibers having differing pre-tension which are then formed into a composite belt compromise the strength of the resulting composite belt. Adjustment of the pre-tension can be carried out by operating the braking mechanism on the spool comprising the roving.
  • the braking mechanism on each spool can be actuated in order to achieve a common pre tension among each set of fibers to be used and thereby ensuring that the strength of the belt is improved, bleating serves to remove any residual impurity resting on the fiber surface, thereby ensuring that the impregnated fiber is of a high quality, bleating can be carried out using any means suitable. Most preferably it is carried out via an inductive heater unit.
  • pre-treatment can include the combining of fibers of one roving with the fibers of one or more other roving before spreading occurs.
  • the spread and impregnated fibers are aligned with respect to each other.
  • This advantageously provides for a control of fiber layer distribution throughout the cross- section of the load carrier and ultimately the composite belt.
  • a gap of distance (D) is present in the vertical direction between the groups of fiber layers. Alignment preferably occurs using alignment wheels - the minimum distance of D is one quarter of a fiber diameter- this advantageously allows for control of the fiber layer orientation.
  • the spread and impregnated fibers are optionally treated with resin.
  • further treatment with resin is occurs if there are spaces between layers or groups of layers devoid of resin.
  • further treatment occurs in a transversal resin injection chamber. This advantageously ensures optimum impregnation of the fibers.
  • the invention also relates to:
  • each fiber within the one or more FL contacts an adjacent fiber within the same FL.
  • first fiber layer (1FL) contacts at least one second fiber layer (2FL) to provide a group of fiber layers (FG)
  • each fiber within the 1FL contacts an adjacent fiber within the 1FL and
  • FG1, FG2 a group of fiber layers (FG1, FG2) comprises at least one first fiber layer (FL) in contact with at least one second fiber layer (FL).
  • FG1, FG2 a group of fiber layers (FG1, FG2) comprises at least one first fiber layer (1FL) in contact with at least one second fiber layer (2FL).
  • Fig. 1 shows a representation of a production process according to an embodiment of the invention
  • Fig. 2 shows a representation of a production process according to an embodiment of the invention
  • Fig 3 shows a composite elevator belt obtained by the process according to the invention
  • Fig. 4 shows a step diagram of a process according to the invention.
  • the commercially obtainable rovings used are normally too thick and not wide enough to cover the desired load carrier width.
  • a 12 K roving i.e., a fiber bundle having 12,000 fibers
  • W width
  • T thickness
  • Such a roving has 22 layers of fibers in the thickness direction.
  • the desired width (W) of the load carrier is 42 mm and the desired thickness is 0.014 mm.
  • Such a load carrier has only 2 layers in the thickness direction. Therefore, in order for this 12K roving to be made into a load carrier having the desired width, the number of fiber layers needs to be reduced from 22 to 2, see Table 1.
  • Table 1 Fiber bundle dimension of a 12 K roving and the required dimensions for a load carrier of 42 mm in width
  • Such a roving has double as many fibers as a 12K roving. This is equivalent to a load carrier of 42 mm in width having 4 fiber layers. Table 2 shows typical roving sizes and the corresponding number of layers in a load carrier of 42 mm in width. Preferably the fiber diameter of the roving is 7 pm.
  • Table 2 Roving size and number of layers in a load carrier with a width of 42 mm or 84 mm.
  • each fiber layer could be spread separately but this would require a significant amount, e.g., hundreds, of spreaders and impregnators which is not possible in practical terms. It can thus be advantageous to combine more than one roving before performing the spreading step, which would result e.g. in a fiber group having horizontally and vertically connected fibers. In such a case, for example, only around five spreaders and impregnators to produce a composite elevator belt would be required. By feeding more than one roving into a spreading apparatus, this produces more layers in a fiber group, and thus advantageously provides a more economic production process.
  • the process employs an apparatus 2000 as shown in Fig. l which forms each fiber layer FL individually before the at least one outer layer 210 and the central layer 220 are joined in a final forming stage to form a belt 100.
  • the apparatus 2000 includes a first roving coil rack 2100a associated with the central layer 220, a second roving coil rack 2100b associated with a first of the outer layers 210, and a third roving coil rack 2100c associated with a second of the outer layers 210.
  • the roving coil racks 2100a-2100c hold the load carrier strands 211, 231, 221 for the outer layers 210 and central layer 220, respectively.
  • a first resin bath 2200a associated with the central layer 220 and a first roving coil rack 2100a contains a bath of liquid resin for forming the resin coating (not shown) of the central layer 220.
  • the load carrier strands 221 of the central layer 220 of width WR are pulled from the first roving coil rack 2100a and over an inductive heater unit 3000.
  • the strands 221 are subjected to a pre-tensioning step via actuation of the braking mechanism 2110 comprised within the spool 2100a. Once the pre-treatment stage is completed, the strands 221 enter a spreading apparatus 4000 so that the width WR is increased to WC.
  • the spreading apparatus 4000 comprises a plurality of spreading means 4100, at least one of which is preferably powered.
  • An example of such a spreading means is a spreader bar 4100.
  • three spreader bars 4100 are used.
  • a further bar 4100 can be added to create a defined relative movement between the moving fibers 211 and the spreading bar 4100 surface to maintain an equal fiber distribution over the width of the load carrier 200 and thereby the elevator belt 100.
  • the spread fibers 221s of width WC are pulled through the first resin bath 6000a to impregnate the load carrier strands 221 with liquid resin.
  • the resin bath 6000a comprises an impregnating means 5000 wherein the impregnating means 5000 comprises a plurality of impregnating means 5000a, 5000b, 5000c.
  • the first impregnation means 5000a with which the fibers 221s come into contact moves in the same direction as the pulling direction of the tractor 2500.
  • the second impregnation means 5000b with which the fibers 221s come into contact moves in a direction opposite to the pulling direction of the tractor 2500.
  • the third impregnation means 5000c with which the fibers 221s come into contact moves in the same direction as the pulling direction of the tractor and facilitates removal of the impregnated fibers 22 li from the resin bath 6000a.
  • second and third resin baths 6000b, 6000c associated with the outer layers 220 and the second and third roving coil racks 2100b, 2100c each contain a bath of liquid resin for forming the resin coating (not shown) of the outer layers 210.
  • the load carrier strands 211, 231 of the two outer layers 210 each having a respective width WR are pulled from the second and third roving coil racks 2100b, 2100c and over an inductive heater unit 3000.
  • the strands 211, 231 are subjected to a pre-tensioning step via actuation of the braking mechanism 2110 comprised within the spools 2100b and 2100c.
  • the spreading apparatus 4000 comprises a plurality of spreading means 4100, which are preferably powered.
  • An example of such a spreading means is a spreader bar 4100. In the figure, three spreader bars 4100 are used.
  • a further bar 4100 can be added to create a defined relative movement between the respective moving fibers 211, 231 and the spreading bar 4100 surface to maintain an equal fiber distribution over the width of the load carrier 200 and thereby the elevator belt 100.
  • the spread fibers 211s, 231s each having a respective width WC are pulled through their respective resin baths 6000b, 6000c to impregnate the load carrier strands 211, 231 with liquid resin.
  • Each of the respective resin baths 6000b, 6000c comprise an impregnating means 5000 wherein the impregnating means 5000 comprises a plurality of impregnating means 5000a, 5000b, 5000c.
  • Each impregnation means 5000a, 5000b, 5000c is powered.
  • the impregnation means 500a, 500b, 500c is preferably a wheel.
  • the first impregnation means 5000a with which the respective fibers 211s, 231s come into contact moves in the same direction as the pulling direction of the tractor 2500.
  • the second impregnation means 5000b with which the respective fibers 211s, 231s come into contact moves in a direction opposite to the pulling direction of the tractor 2500.
  • the third impregnation means 5000c with which the respective fibers 211s, 231s come into contact moves in the same direction as the pulling direction of the tractor and facilitates removal of the impregnated fibers 21 li, 23 li from the resin bath 6000a.
  • the liquid resin in the resin baths 6000a, 6000b, 6000c may be intermixed with an additive suitable for forming a plurality of cavities (not shown) in the resin coating.
  • the additive may be a blowing agent, such as azodicarbonamide, which decomposes into gas during the subsequent curing of the liquid resin.
  • the additive may be solid particles, liquid particles, or gas particles.
  • the amount or volume of the chosen additive intermixed with the liquid resin may be governed to control the total volume of the cavities ultimately defined in the finished resin coating. Measures may be undertaken to ensure that the additive is homogenously intermixed with the liquid resin so that the cavities are subsequently defined having substantially uniform spacing in the finished resin coating.
  • the load carrier strands 211, 221 may be coated with an additive, such as a blowing agent, prior to being pulled into the resin baths 6000a, 6000b, 6000c, alternatively or in addition to the additive intermixed with the liquid resin.
  • an additive such as a blowing agent
  • the load carrier strands 21 li, 22 li, 23 li are pulled out of the resin baths 6000a-6000c and into a layer distance alignment means 7000 in order to arrive at a preferred distance D between the fiber layers, i.e., between the outer layer 201 and the central layer 220.
  • a distance D l exists between the central layer 220 and the top outer layer 210 and a distance D2 exists between the central layer 220 and the bottom outer layer 210.
  • D l and D2 are equal. It is also envisaged that D l and D2 can be different.
  • a distance D l exists between the central fiber group layer FG2 compromised of a plurality of fiber layers 210, and the top fiber group layer FG1, comprised of a plurality of fiber layers 210.
  • a distance D2 exists between the central fiber group layer FG2 comprised of a plurality of fiber layers 220 and the bottom outer fiber group layer FG3 comprised of a plurality of fiber layers 210.
  • Dl and D2 are equal. It is also envisaged that D l and D2 can be different. Then the impregnated fibers 21 li, 22 li, 23 li are pulled into a forming and curing die 2300 where the outer layers 210 and central layer 220 are joined together. When entering the forming and curing die 2300, the liquid resin impregnating the load carrier strands 211, 221, 231 remains in an at least partially liquid phase to facilitate adhesion of the outer layers 210 to the central layer 220.
  • final shaping of the outer layers 210 and the central layer 220 is performed, and the liquid resin impregnating the load carrier strands 21 li, 22 li, 23 li is cured to form the resin coatings (not shown) of the outer layers 210 and central layer 220.
  • Curing of the resin coatings may be achieved, for example, by induction heating of the load carrier strands 211, 221, 231 and/or the liquid resin.
  • the forming and curing die 2300 may also provide heat to decompose the blowing agent prior to or concurrently with the curing of the resin coating 212 of the outer layers 210.
  • the load carrier 200 may optionally be pulled through a jacket extruder 2400 which deposits the jacket layer 300 onto external surfaces of the load carrier 100.
  • the composite elevator belt 100 exits the jacket extruder 2400 fully formed.
  • the width of the load carrier increases from WC to WB thus the width WB represents the width of the elevator belt 100.
  • a tractor 2500 located downstream of the jacket extruder 2400 and/or the forming and curing dies 2300 applies a pulling force to unwind the load carrier strands 211, 221, 231 from the roving coil racks 2100a-2100c and pull the load carrier strands 211, 221, 231 through the resin bath 6000a-6000c, the forming and curing die 2300, and, optionally, the jacket extruder 2400.
  • the finished composite elevator belt 100 is then wound into a spool by a spooler 2600.
  • a method for making a composite elevator belt 100 includes partially forming the at least one outer layer 210 of the load carrier 100 by impregnating the load carrier strands 211 of the at least one outer layer 210 with liquid resin in the second and third resin baths 6000b, 6000c.
  • the liquid resin in the second and third resin baths 6000b, 6000c may be intermixed with an additive selected from a group consisting of deformable materials and blowing agents.
  • the central layer 220 of the load carrier 100 may be formed in substantially the same manner as the outer layers 210, namely by impregnating the load carrier strands 221 of the central layer 220 with liquid resin in the resin bath 6000a.
  • the outer layers 210 and the central layer 220 may then be pulled from the forming and curing die 2300 to join the outer layers 210 to the central layer 220 and cure the liquid resin of the outer layers 210 and the central layer 220.
  • the spacing between fibers in at least one fiber layer e.g., outer or central
  • a transversal resin injection chamber 8000 comprises a plurality of injection means 8100 for supplying a resin material to the impregnated strands 21 li, 22 li, 23 li.
  • a preferred injection means 8100 is a nozzle.
  • the figure 2i shows the fibers 21 li, 22 li, 23 li in their respective fiber layers 210, 220, 210 the entering the transversal resin injection chamber 8000 and the nozzles 8100 for supplying the resin material.
  • the nozzles 8100 are shown as being positioned between the fiber layers 210, 220, however, they may be positioned at any point. This final impregnation step can be added to ensure that all load carrier strands 21 li, 22 li, 23 li are completely impregnated and that no areas void of resin exist before entering the forming and curing die 2300.
  • At least one further spool comprising a roving may also be added to the spool rack 2100 in order to add further layers to the composite elevator belt 100.
  • the fiber layers and fiber groups will resemble those as shown in figure lii.
  • the load carrier 200 may include an outer layer 210 on only one side of the central layer 220, or the load carrier 200 may include multiple outer layers 210 stacked on and joined with each other on any side or sides of central layer 220.
  • Fig. 3 shows a schematic representation of a composite elevator belt 100 obtained from the process according to the invention as described in figures 1 and 2.
  • the belt 100 comprises a plurality of fibers 211, 221, 231 in a matrix 201.
  • the fibers 211 and 231 represent a top outer layer 210 and a bottom outer layer 210 respectively.
  • the fibers 221 represent a central layer 220.
  • the top outer layer 210 comprises two fiber layers 1FL, 2FL.
  • the fibers 211, 221, 231, extend in the longitudinal direction and the fiber layers FL, 1FL, 2FL extend across the width direction.
  • Figs. 3a to 3c are merely for information purposes to show in which plane the fiber layers are positioned.
  • the fibers 211 in each fiber layer 1FL, 2FL contact an adjacent fiber in the same fiber layer.
  • the fiber layer 1FL contacts the fiber layer 2FL such that the fibers 211 in 1FL are aligned in matching sequence with the corresponding fibers 211 in the contacting fiber layer 2FL to form a fiber group FG1.
  • the central layer 220 comprises two fiber layers 1FL, 2FL.
  • the fibers 221 in each fiber layer 1FL, 2FL contact an adjacent fiber in the same fiber layer.
  • the fiber layer 1FL contacts the fiber layer 2FL such that the fibers 221 in 1FL are aligned in matching sequence with the corresponding fibers 221 in the contacting fiber layer 2FL to form a fiber group FG2.
  • a distanceD l exists between the fiber group FG1 and the fiber group FG2. This distance is determined by the distance alignment means 7000.
  • a distance D2 exists between the fiber group FG2 and the fiber layer FL comprising fibers 231 of the bottom outer layer 210. Again, this distance is determined by the distance alignment means 7000.
  • the fibers in each fiber layer FL are shown to be in contact, however it is also envisaged that there can be an inter-fiber distance between at least two adjacent fibers in a fiber layer. This spacing is preferably determined by the spreading apparatus 4000.
  • the layers of fibers can be orientated according to desire, it is further envisaged that the fiber groups can be orientated according to desire.
  • the fiber layers within a fiber group can also be located such that there is a disjoint between the layers and the fibers are not aligned in matching sequence with the corresponding fibers of the contacting layer.
  • Fig. 4 shows a step diagram of the process according to the invention.
  • a first step requires the provision of one or more rovings 21, 22, 23 comprising a plurality of fibers 211, 221, 231 on spools 2100a, 2100b, 2100c, to a spool rack 2100.
  • the second step requires spreading the fibers to a width Wc-
  • a third step involves the impregnation of the spread fibers to provide impregnated fibers 21 li, 22 li,, 23 li.
  • the fourth step requires alignment of the fibers in their respective layers so that a desired distance D exists between each fiber layer FL.
  • the fiber layers FL can be optionally introduced to a transversal resin chamber 8000 in order to further impregnate the fibers.
  • the fifth step is passing the impregnated fibers 21 li, 22 li, 23 li through a forming and curing die 2300 to produce a load carrier 200 which is then extruded in a sixth step to form a composite elevator belt 100 having a desired fiber distribution throughout its cross- section.

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Abstract

La présente invention concerne un procédé de fabrication d'une courroie élévatrice composite comportant une ou plusieurs couches de fibres. Ledit procédé comprend les étapes suivantes : a) fournir une ou plusieurs mèches ayant une largeur (WR), chaque mèche comprenant une pluralité de fibres ; b) étaler les fibres à l'aide d'un appareil d'étalement pour augmenter la largeur (WR) ; c) imprégner les fibres étalées dans un bain de résine ; traiter à nouveau les fibres imprégnées pour former un support de charge ; le procédé est caractérisé en ce que la pluralité de fibres d'une première mèche sont soumises aux étapes de traitement (b) et (c) séparément de la pluralité de fibres d'au moins une autre mèche ; la pluralité de fibres de la première mèche et la pluralité de fibres de la mèche ou des mèches supplémentaires subissant simultanément les étapes de traitement (b) à (c).
PCT/EP2019/058302 2019-04-02 2019-04-02 Procédé de fabrication d'une courroie élévatrice composite comprenant une ou plusieurs couches de fibres Ceased WO2020200430A1 (fr)

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PCT/EP2019/058302 WO2020200430A1 (fr) 2019-04-02 2019-04-02 Procédé de fabrication d'une courroie élévatrice composite comprenant une ou plusieurs couches de fibres

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PCT/EP2019/058302 WO2020200430A1 (fr) 2019-04-02 2019-04-02 Procédé de fabrication d'une courroie élévatrice composite comprenant une ou plusieurs couches de fibres

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20250346454A1 (en) * 2024-05-07 2025-11-13 Otis Elevator Company Twist resistant elevator suspension member

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JPH03193416A (ja) * 1989-12-25 1991-08-23 Sekisui Chem Co Ltd ロービングに樹脂粉を含浸させる方法
CN104552988A (zh) * 2014-12-30 2015-04-29 天津高盛钢丝绳有限公司 一种超轻质复合材料曳引带的制备方法及制备系统
US9126805B2 (en) 2012-02-13 2015-09-08 Kone Corporation Rope of an elevator and a method for manufacturing the rope
WO2018046980A1 (fr) * 2016-09-06 2018-03-15 Fibre Reinforced Thermoplastics B.V. Composites renforcés par des fibres, stratifiés les comprenant, et systèmes et procédés de fabrication de tels stratifiés
WO2018199256A2 (fr) * 2017-04-26 2018-11-01 三菱電機株式会社 Ascenseur, corps de suspension associé, et procédé de production de corps de suspension

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Publication number Priority date Publication date Assignee Title
JPH03193416A (ja) * 1989-12-25 1991-08-23 Sekisui Chem Co Ltd ロービングに樹脂粉を含浸させる方法
US9126805B2 (en) 2012-02-13 2015-09-08 Kone Corporation Rope of an elevator and a method for manufacturing the rope
CN104552988A (zh) * 2014-12-30 2015-04-29 天津高盛钢丝绳有限公司 一种超轻质复合材料曳引带的制备方法及制备系统
WO2018046980A1 (fr) * 2016-09-06 2018-03-15 Fibre Reinforced Thermoplastics B.V. Composites renforcés par des fibres, stratifiés les comprenant, et systèmes et procédés de fabrication de tels stratifiés
WO2018199256A2 (fr) * 2017-04-26 2018-11-01 三菱電機株式会社 Ascenseur, corps de suspension associé, et procédé de production de corps de suspension

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20250346454A1 (en) * 2024-05-07 2025-11-13 Otis Elevator Company Twist resistant elevator suspension member

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